I saw this on a high priced board manufacturer's site. Looks like carbon additive mixed with epoxy to form the rails.
Seems like a great way to simplify your supply chain and re-use carbon fibre cutoffs.
Plus bonding should be easier than with urethane or abs.
Makes me wonder why we bother with abs/urethane at all

But, you're right. I never ever bothered with the ABS. Have a look for how long the orange - green color is crisp on my 120cm board which I ride for the last ~3 years...Epoxy would fade looong time ago. The PU is not even close to delaminating.

That pic above, man, they charge >1000 Euros for it. All materials are not more than 30 Euros, how much profit is that? And the CNC all the way. Good on them!
Hope they paint this expensive product, or leave it on the Sun and will cook in no time